Use a non-standard port for the test server

Start the test API server on a non-standard port to avoid
conflicting with a server already running due to devstack.

Change-Id: I010c76376048e3433301ccc64ce35db11e69a3e7
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge "Use a non-standard port for the test server"